Drop side telescopic drum



April 19, 1932. w. E. SWERN DROP SIDE TELESCOPIG DRUM Original Filed Aug. 23, 1926 A TTORNEY5.

Patented Apr. 19, 1932 UNITED STATESL'PATENTI OFFICE WILLIAM E. swmm, or KOKOMO, INDIANA, assienonmo Papa. a FRANK, or export,

OriginaI application filed August 23, 1926, Serial No. 130,883. Patent No. 1,754,583, dated April 15, 1930.

Divided and this application filed The present invention relates to the manu- 1 future of pneumatic tire casings or carcasses and while certainjfeatures of the invention may be used in the manufacture of tires by 5 any of the well known or standard methods, 2 the invention is particularly adapted and useful in the so-called 'flat building or drum methods of manufacture.

One of the objects of the invention is to pro- 1 vide a form or drum for the building of a tire which the central or body portion of the drum and the tire built thereon is flat or cylindrical, being provided with drop sides .or reduced seats for the location of the beads or 16 bead cores which form the beaded edges of the casings. The drop side construction permits the positioning of beads in the formation of a fiat drum carcass below or within the cylindrical periphery of the carcass. Another 20 object of the invention is to provide a certain range of adjustability in the width of the drum, or that portion thereof upon which the casing is built up, so that a single drum may be used for the manufacture of tires of vary ing cross sections but of the same bead diameter. While this result may bev secured in other ways,'the preferred method as shown.

herein is by forming the drum in a plurality of sections arranged to telescope together in seats. Another object of the-invention is to provide a drum which may be reduced in width vto a suflicient extent to permit the finished carcass to be removed without collapsing the drum radially or making the same in sections. This beneficial result is particularly useful in the manufacture of the drop side form of tire casing, that is, the form ofcasing in which the beaded portions or edges of the tire are less in diameter than the central area of the casing. The formation of the drum is such that the tubular portions may be tele-V scoped relative to each other for permitting tires having the same bead diameter 01' to persecuring the proper width between the bead' the same drum to form different widths of mit'the removal of'a carcass formed'thereon by additionally telescoping the drum and by angularly working the beads over the same or carcass removal. This construction, ho'w- D302 SIDE TELESCOI'IG DRUM May 20, 1929. Serial No. 364,378.

ever, may be used to advantage in the manufacture of tires flat from edge to edge or in the manufacture of tires having arc-shaped central areas.

' The present invention production of drum type tire casings, either clincher or straight side, by showing the formation of the carcass upon the drum. The telescoped parts thereof are moved toward each other to permit removal of the carcass which is in cylindrical arrangement and this thereafter is suitably deformed and expanded and then cured in the deformed or expanded state, such expansion being obtained either mechanically or pneumatically and the curing occurring by any of the well known processes.

The invention is particularly designed for use in the tire building processes wherein the casing or carcass is removedwhile in the unvulcanized or uncured state, the tire being subsequently shaped and cured by the use of expanding devices and processes of various kinds. The subsequent shaping processes form no part of the present invention, and it is v not necessary that they be described herein.

This invention is a-division of my copending application Serial'No. 130,883, filed August 23. 1926, which hasmatured into Pat. 1.754;,583. issued April 15. 1930, entitled Tire building machine, which is, as stated therein, a continuation in part of my likewise copending application Serial No. 723,- 353', filled June 30, 1924, which has matured into Pat. 1,741,208, issued Dec. 31, 1929, and entitled Full drum type tire and process of forming same.

The feature of providing drop sides or re duced bead seats substantially as shown in Figures 3, 5 and 6 hereof is made the subject matter of copending application Serial No. 535,140, filed May5,1931, as a division of the present application. f

The full nature of the invention will be understood from the accompanying drawings and the following description and claims.- h

Ofthe accompanying drawings,

a semi-fiat drum hand or by trating the straight side type. In the last-mentioned fi,

tional views of a portion of a modified drum with the carcass positioned thereon, the former figurekillustrating a drum adapted for clincher t e tires and the latter a drum for straight si e type times.

a In the drawings indicates a base and extending upwardly therefrom is a supporting standard 13. Pro ecting laterally from said standard is a support 14 for a drum spindle 15 mounting the drum 16. A suitable clutch is associated with the spind and the drum is rotated through power means controlled by a link 18 and terminating in the foot lever 19.

Look 17 holds the shaft stationary for telescoping the drum through parts not shown so that the parts of the drum may be telescoped when the drum is rotated either; by momentum previously acquired through shaft rotation.

' The drum consists of a pair of annular members provided with a peripheral face 61 recessed to receive a cylindrical member 62,

the said cylindrical members being telescopically associated. In this way any width of drum surface can be obtained for any given diameter of bead. Of course different diameter drums may be substituted sothat the same machine, by interchanging drums, is capable of forming carcasses for a complete line 0 tire sizes.

Each of the circular members 60 includes an inclinedface 63, the faces being oppositely inclined to each other and being relieved or tapered as at 64. The drum is suitably supported upon the spindle 15 and is rotated thereby. The inclined face 63 and relieved portions 64 permit the head 65 of the tire to lie substantially below the main body portion thereof when formed on the drum. This constitutes the drop side formation of the tire carcass.

The resultant adjustable drum construction permits any width of tire to be obtained for any given bead diameter and, as shown in the drawings, said tire may be of either the straight side or clincher type, Figure 3 illusclincher and Figure 4 the are, the are numbefed with the 100 senes, inclined face being numbered 163, telescoping tubes 162, drum frame or edge lfioandthemliendfacelfi. a

f 2. A t1re building Figures 5 and 6 show substantially the same drum, the first being ada ted for formingv clincher type tires and t e second for straight side tires. These drums differ from thoseshown in Figures 3 and 4 res ectively by having arelieved face 264. he same parts are indicated by numerals of the 200 series, 262 indicating the tubular portions telescopically associated together, 260 indirating the frame members and 263 the inclined face. v

In the manufacture of straight side tires the bead portion thereof is built in such a position that the rotation of the edge por-' tion of the carcass about the head in passing from the flat built condition to the shape of a tire casing is reduced to a minimum.

To remove the carcass of the tire from the drum the two sections of the drum are brought together, decreasing the overall width of the drum to such an extent'that the tire may be removed b swinging one side of the tire over the co lapsed drum, while the other side of the. drum is forced into the central portion of the'casing. In addition to the ease of operation as referred to in the opening portion of the specification, the present invention permits the removal of the completed carcass without dividing the drum into sections or segments. This makes it possible to construct a drum with fewer operative parts and a drum which will have longer life and require less maintenance and repair.

What is claimed is:

1. A drum tire building machine including a pair of annular bead-receiving frame members, and tubular extensions carried by each and extending toward each other and telescopicallyassociated together, said tubular extensions sup forming portions 0 the carcass.

v drum comprising a shaft, a drum on the shaft, and a device for holding one of said elements while the other is rotated, said drum having a plurality of sections movable along the shaft in order to reduce the width thereof.

3. In combination, a drum having outwardly facing bead su porting rings at the edges of the drum, and tensions secured to the rings and projecting toward one another to constitute the surface whereon the tire-is to be built.

4. In combination a drum having outwardly facing bead edges of the drum, and thin cylindrical extensions secured to the rings and projecting toward one another to constitute the surface whereon the tire is to be built, the extensions rting' the tire body- .thin cylindrical exsupporting rings at the being adapted to telescope when the rings are at their inner positions.

5. A tire building form comprisinga main body portion substantially flat in cross section, and reduced bead seating portions'on the edgesof the body portion, said body by side tocomplete portion being divided and constructed to permit the bead seating portions to approach tire built thereon.

7. A tire building form being composed of two continuous annular sections placed side the form, said sections being adapted to be permit the removal of a carcass built thereon.

8. A tire building form divided into a plurality of sections along a plane transverse to the axis of the form, the sections being adapted to telescope sufficiently to permit removal of the carcass built thereon.

9. A tire building form dividedinto a plurality of sections along a plane transverse to the axis of the form, the sections being provided with reduced bead seats, and being adapted to be moved telescopically. 1

1O. A drum for use in the buildingof tire casings. comprising .outer rings having reduced bead seats found thereon, and con tinuous cylindrical sheet metal drum sections attached to the rings and arranged in facing relations, one of said sections being movable within the other section. to a sufiicient extent to reduce the width of the drum and permit the tire to be removed therefrom.

11. A drum comprising a plurality of continuous, unbroken annular sections arranged upon a shaft, the sections being movable relatively to one another.

12. A tire building drum comprising a plurality of continuous, unbroken annular sections arranged upon a shaft, the outer edges of the sections being formed with reduced bead seats. the sections being movable to cause the bead seats $5 of the relative adjustment of its width.

14. The combination with a tire buildin machine having a rotatable driven shaft and a chuck secured to the shaft, of a cylindrical drum mounted upon the chuck, said drum i0 being composed of axially adjustable sections wherebyto permit variations in the.width its axis sufficiently to telescoped sufliciently to to approach-thereby freeing the tire carcass from the drum and 15. A-tire building drum comprising a pair of oppositely disposed edge members each aving a portion thereof forming a part of the outer periphery of the drum and inclined edge portions constituting a bead seat, and means for supporting said edge members and permitting relative" adjustment thereof to vary the distance between the bead seats without changing the diameter of the outer periphery of the drum.

In witness whereof I have hereunto aflixed my signature.

- WILLIAM E. SWERN.

of the drum, and means to provide the drum with a substantially smooth cylindrical surface when the sections are in their various 5 positions of adjustment; 

